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Precision rectifier

About: Precision rectifier is a research topic. Over the lifetime, 4952 publications have been published within this topic receiving 63668 citations. The topic is also known as: super diode.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors present the design and characterization of dc-dc converters operating at microwave frequencies, which are based on GaN transistor class-E power amplifiers and rectifiers.
Abstract: This paper presents the design and characterization of dc–dc converters operating at microwave frequencies. The converters are based on GaN transistor class-E power amplifiers (PAs) and rectifiers. Three topologies are presented, which are: 1) a PA and synchronous rectifier, requiring two RF inputs; 2) a PA and self-synchronous rectifier with a single RF input; and 3) a power oscillator with a self-synchronous rectifier with no required RF inputs. The synchronous 1.2-GHz class- ${\hbox{E}}^{2}$ converter reaches a maximum efficiency of 72% at 4.6 W. By replacing the RF input at the rectifier gate with a specific termination, a self-synchronous circuit demonstrates 75% efficiency at 4.6 W, with a maximum output power of 13 W at 58% efficiency. In the third topology, the PA is replaced by a power oscillator by providing correct feedback for class-E operation, resulting in a circuit requiring no RF inputs. This oscillating self-synchronous dc–dc converter is demonstrated at 900 MHz with an efficiency of 79% at 28 V and 12.8-W output power. Self-synchronous class-E transistor rectifier operation is analyzed theoretically in the time domain and validated with harmonic-balance simulations using an improved nonlinear model for a GaN HEMT. The simplified theoretical analysis provides a useful starting point for high-efficiency self-synchronous power rectifier design, which can, in turn, be extended to high-efficiency oscillating power inverter design.

27 citations

Patent
09 Mar 1990
TL;DR: A self-contained, four-terminal, unity power factor, electronic rectifier module is presented in this paper, which includes bridge diodes which form a full wave bridge rectifier, a control circuit, and a diode which components act together to draw a sinusoidal current from the line.
Abstract: A four-terminal, unity power factor, electronic rectifier module. The electronic rectifier module is self-contained and includes therein bridge diodes which form a full wave bridge rectifier, a control circuit, and a diode which components act together to draw a sinusoidal current from the line. The self-contained, four-terminal module is designed to permit a high-frequency input capacitor and a line inductor to be connected to its input terminals and a smoothing capacitor to its output terminal. The module avoids the need to provide a separate pair of power terminals for the standard filtering components, resulting in a more economical package and in an easier-to-use module.

27 citations

Patent
16 Jun 1995
TL;DR: In this article, a battery-free non-contacting information card with a relatively simple arrangement which prevents an IC chip or the like from being destroyed by an excess voltage is presented.
Abstract: A battery-free non-contacting information card of a relatively simple arrangement which prevents an IC chip or the like from being destroyed by an excess voltage. This non-contacting information card includes a resonance circuit (3) for receiving a carrier signal (e.g., FSK signal) modulated on the basis of information supplied from a card reader/writer (2), an information processing systems (5), (6), (7) for obtaining information from the carrier signal and a rectifier systems (13) for obtaining a voltage by rectifying the carrier signal, wherein the non-contacting information card can be operated by the voltage obtained at the output side of the rectifier circuit (13). The resonance circuit (3) includes a variable capacitive element (3d). A resonance frequency of the resonance circuit (3) is varied by varying the capacity value of the variable capacitive element (3d) in response to the voltage value obtained at the output side of the rectifier circuit (13) to thereby make the voltage value obtained at the output side of the rectifier circuit (13) substantially constant.

27 citations

Proceedings ArticleDOI
15 May 2011
TL;DR: In this article, a direct power control (DPC) based on grid virtual-flux for controlling the operation of three-phase, three-wire pulsewidth modulation (PWM) bidirectional rectifier is presented.
Abstract: This paper presents a direct power control (DPC) based on grid virtual-flux for controlling the operation of three-phase, three-wire pulse-width modulation (PWM) bidirectional rectifier. Virtual-flux of main supply voltage is used to estimate the instantaneous active and reactive power of the PWM rectifier. Theoretical background of the DPC scheme utilizing virtual-flux of supply voltage is provided, giving a basic understanding the operation of PWM rectifier as a power conditioner. Some results of computer simulation and hardware implementation are given for studying and analyzing the operation and performances of the rectifier under the steady-state and transient conditions. The results have shown that DPC with virtual-flux implementation exhibited several advantages as compared to the conventional DPC scheme such as low total harmonic distortion of input currents, almost unity power factor operation and good dynamic response.

27 citations

Patent
23 Apr 1992
TL;DR: In this article, a multiple-section cable equalizer with a signal level detector (700-800) produces a clipping control signal (4) for amplifiers in each equalizer section (200,220,240), so that a variable level input signal (5,6) is restored to an equalized output signal (87,88) that is free of distortion and attendant bit errors.
Abstract: A multiple section cable equalizer with a signal level detector (700-800) produces a clipping control signal (4) for amplifiers in each equalizer section (200,220,240), so that a variable level input signal (5,6) is restored to an equalized output signal (87,88) that is free of distortion and attendant bit errors. A fixed reference clipping stage (300) after the last equalizing stage (240) produces a signal clipped to a final output level. A feedback path (500,600) restores DC and low frequencies lost due to AC coupling. A test output stage (400) permits monitoring (110,111) of the operation of the equalizer stages (200,220,240). The signal level detector contains (in series), a differential amplifier (700) with low pass filtering (R22,C1,R18), a balanced modulator detector (710), a voltage amplifier (720), a comparator and peak detector (730,CX4), a transconductance amplifier (740) and a plurality of current mirrots (750,760,770,800) operatively connected to determine a difference current (59) from the output (48,49) of the transconductance amplifier (740) and convert this to a clipping control signal (4) voltage level. A defeat comparator (790) monitors the output (37) of the comparator and peak detector (790) and replaces the variable difference current (59) with a fixed reference current (800) when an external capacitor (CX4) used by the peak detector (730) appears to be shorted.

27 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202345
202299
20217
202017
201910
201833